Centrifugal governor.



PATENTED JULY '21, 1908.

G. W. YOUNKMAN.

CENTRIFUGAL GOVERNOR. APPLIOATION FILED APE. 30,1907.

UNrrnn .srarns ATENT onnron GEORGE W. YOUNKMAN, OF DENVER, COLORADO.

CEN'IRIFUGAL GOVERNOR.

To all whom it may concern:

Be it known that I, GEORGE W. YoUNx- MAN, a citizen of the UnitedStates, residing in the city and county of Denver and State of Colorado,have invented certain new and useful Improvements in CentrifugalGovernors; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters and figures ofreference marked thereon, which form a part of this specification.

My invention relates to improvements in centrifugal governors, my objectbeing to provide an efficient device of thisclass, for automaticallyregulating the speed of a shaft connected with any suitable mechanism.

The mechanism will now be described in detail reference being made tothe accompanying drawing in which is illustrated an embodiment thereof.

In this drawing, Figure 1 is a side elevation of my improved mechanism.Fig. 2 is an edge view of the same partly in section, the flange of thestationary member being partly broken away. Fig. 3 is a fragmentarydetail view of one of the tension springs and the regulating stemconnected therewith, the parts being shown on a larger scale.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a stationary member having a circular flange6 whose inner surface is acted on by friction devices 7 connected withthe governor mechanism as hereinafter explained. A shaft 8 is so arranged that its axis coincides with the axis of the circular flange ofthe stationary member. This shaft 8 is suitably journaled and connectedwith the mechanism (not shown) to be controlled by the governor.

Keyed to the shaft 8 whereby it is caused to -rotate therewith is asleeve 9 which sur- Specification of Letters Patent.

Application filed April 30, 1907.

Patented July 21, 1908.

Serial No. 371,186.

I arms, though the structure is better balanced and will undoubtedlywork more smoothly and efficiently where the two pairs of arms areemployed. The outer extremity of each arm 10 is provided with two parts12 and 13 extending in different directions and forming a suitable anglewith each other. The two parts 13 of each pair of arms 10, are arrangedon opposite sides of one extremity of a lever 14 and are pivotallyconnected with the same by means of a pin 15 held in place in anysuitable'manner as by a cotter 16. The opposite extremity of each lever14 is provided with a weight 17 connected by means of two links 18, withthe outer extremities of two radial arms 19 whose inner extremities areformed integral with collars 20 loosely surrounding the reduced outerextremities of the sleeve 9. The reduction of these sleeve extremities,form shoulders whereby collars 20 together with their arms 19 aresuitably spaced. The two levers 14 together with their weights 17 arearranged on opposite sides of the shaft 8, whereby the structure isperfectly balanced. The corresponding extremities of these two leversare also oppositely disposed for the same purpose. The extremity of eachlever remote from the weight, is provided with a cam portion 21 adaptedto act on a cap screw 22 connected with each friction shoe 7. Thesefriction shoes are curved to conform to the curve of the inner face ofthe flange 6 of the stationary member 5. Each shoe is provided with aremovable wearing member 23 which directly engages the inner face of theflange 6 when the shoes are thrown out against the flange by centrifugalforce.

Each shoe 7 is provided with an extension 7 whose extremity remote fromthe body of the shoe is arranged between the two parts 12 of each pairof radial arms 10, the said extension being connected with the said armsby a pin or key 24. Each extension 7 is also provided with an inwardlyprojecting lug 7 which is connected with a pin 25 attached to oneextremity of a tension spring 26 whose opposite extremity is connectedwith a pin 27 passing through a finger 28 formed integral with one ofthe levers 14. This pin passes through the lever finger, its freeextremity being threaded and provided with a nut 29 which bears againsta washer 30, the latter having a projection 31 entering a recess formedin the finger to prevent the rotation of the washer during theadjustment of the nut. By turning the nut 29 on the screw pin 27 thetension of each spring 26 may be regulated at will, whereby greater orless force would be required in order to cause the friction shoes toengage the inner surface of the rim 6. Each cap screw 22 is adjustablein its friction shoe, with reference to the cam portion of itscorresponding lever 14. Each of these screws is also provided with alock nut 22 for maintaining the screw in any desired position ofadjustment.

From the foregoing description the use and operation of my improvedcentrifugal governor will be readily understood. Assuming that themechanism to be controlled, but not shown herein, is in operation,whereby the shaft 8 and its connections are rotated, the entiremechanism with the exception of the stationary rim 5 is caused to rotatewith the shaft. It must be assumed that the tension of the springs 26has been properly regulated. N ow when the speed of the shaft has becomesuificient, the centrifugal force act ing on the weights 17, will movethe levers 14 sufficiently to cause their cam portions 21 to act on thescrews 22 of the friction shoes, and force the wearing portions 23 ofthe latter outwardly against the inner face of the flange 6 of thestationary device, thus properly regulating the speed of the shaft.

The sleeve 9 forms a stop to limit the inward movement of the fingers 28and theirconnections, when the friction shoes are disengaged from therim 6.

Having thus described my invention, what I claim is:

1. In a centrifugal governor, the combination with a shaft to becontrolled, and a circular stationary member having a friction face,radial arms connected with the shaft, the outer extremities of said armsbeing provided with two p-arts'forming suitable angles with each other,friction shoes pivotally connected with one of said parts and arrangedin suitable proximity to the friction face of the stationary member,weighted levers connected with the other part of said. arm and arrangedto act on the friction shoes, a collar passing loosely around the shaft,a link connection between the said collar and the op- 1 posite extremityof the weighted levers, each of the last named levers being providedwith inwardly-projecting fingers, and tension means connecting the saidfingers with the friction shoes substantially as described.

2. In a centrifugal governor, the combination with a shaft to becontrolled, and a circular stationary member having a friction face,radial arms connected with the shaft, the outer extremities of said armsbeing provided with two parts forming suitable angles with each other,friction shoes pivotally con nected with one of said parts and arrangedin suitable proximity to the friction face of the stationary member,weighted levers connected with the other art of said arm and arranged toact on the 'riction shoes, a collar passing loosely around the shaft, alink connection between the said collar and the opposite extremity ofthe weighted levers, each of the last named levers being provided withinwardly-projecting fingers, springs connecting the said fingers withthe friction shoes, and means for regulating the tension of said springssubstantially as described. Y

3. In a centrifugal governor, the combination with, an operating shaftand a friction means surrounding the shaft, of a sleeve connected withthe shaft to rotate therewith, radial arms rigid with the sleeve andprojecting therefrom in opposite directions, the outer extremities ofeach arm being provided with two parts forming suitable angles with eachother, friction shoes pivotally connected with one of said parts, andweighted levers pivotally connected with the other part of said arm, acollar passing loosely around the shaft, a link connection between thesaid collar and the opposite extremities of the weighted levers, each ofthe last named levers being provided with an inwardly-projecting finger,and tension springs connecting the said fingers with the friction shoes,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE W. YOUNKMAN. I/Vitnesses I,

HENRY JAY MoRTEN, DENA NELSON.

